Add Across Predict withdraw plumbing

[pedronfigueiredo]

Summary

This is PR 1 of 4 in the core stack for Predict withdraws over Across.

• Adds TransactionType.predictAcrossWithdraw.
• Treats isPostQuote requests as actionable for Across support checks.
• Allows source-chain authorization lists only for post-quote Predict withdraw detection, where the original withdraw is not encoded as an Across destination action.
• Generalizes transaction-pay refund documentation from Relay-only language to quote-provider language.

Stack

1. This PR: plumbing to identify Predict Across withdraws
2. Add Across Predict withdraw quote support #8760: quote support
3. Add Across Predict withdraw submit support #8761: submit support
4. Fix Across Predict withdraw gas payment edges #8762: gas payment edge cases

Validation

• yarn workspace @metamask/transaction-pay-controller run jest --no-coverage src/strategy/across/AcrossStrategy.test.ts
• Full stack validation was run on the final stacked branch:
  • yarn changelog:validate
  • yarn workspace @metamask/transaction-pay-controller run test
  • yarn workspace @metamask/transaction-controller run test

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Note

Medium Risk
Modifies Across pay-strategy eligibility logic (including EIP-7702 authorizationList handling) which can affect whether quotes are returned/submitted for certain transactions.

Overview
Adds a new TransactionType.predictAcrossWithdraw and records it in the @metamask/transaction-controller changelog.

Updates the Across pay strategy to treat isPostQuote quote requests as actionable and to only accept them when the underlying transaction is a Predict withdraw, including allowing source-chain authorizationList only for this specific post-quote Predict withdraw path. This includes a new helper (hasUnsupportedTransactionAuthorizationList), expanded AcrossStrategy tests, and a tweak so isPostQuote requests are recognized by isAcrossQuoteRequest.

Clarifies refundTo docs in transaction-pay types to be quote-provider (not Relay) specific, and updates the @metamask/transaction-pay-controller changelog.

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